I have a text file with over 184 thousand lines.
This is the output from a particular application and is basically the dump of the database in JSON format. I need to select the lines which are between curly braces. For example, my file would have some text like this like this:

{..
..
...
}
{
...
....
.....
|
30,000 lines later
|
...
...
}

I need to select these 30,000 odd lines and paste it somewhere else.
Is there any Text editor which lets you do a selection based on edge characters?